通过混凝-絮凝法利用垫材和钢铁行业富含氯化铁的废渣去除炼油厂废水中的表面活性剂和苯酚的价值评估。
Valorization of Pads and Steel Industry FeCl-Rich Rejection for Removing Surfactant and Phenol from Oil Refinery Wastewater Through Coagulation-Flocculation.
作者信息
Dkhissi Ouafae, Chatoui Mohammed, El Hakmaoui Ahmed, Abouri Meriem, Kadmi Yassine, Akssira Mohamed, Souabi Salah
机构信息
Laboratory of Physical Chemistry and Bioorganic Chemistry, Faculty of Sciences and Techniques Mohammedia, Hassan II University of Casablanca, Morocco.
Engineering Laboratory of Water and Environment, Faculty of Sciences and Techniques Mohammedia, Hassan II University of Casablanca, Morocco.
出版信息
J Health Pollut. 2020 Dec 7;10(28):201204. doi: 10.5696/2156-9614-10.28.201204. eCollection 2020 Dec.
BACKGROUND
Refinement of crude vegetable oil generates a large amount of wastewater and is a source of water pollution due to the presence of surfactants and phenols. Phenols are toxic aromatic compounds that can be lethal to fauna and flora, entraining the deceleration or blocking of the self-purification of biological treatments. In addition, surfactants can limit biological processes by inhibiting microorganisms that degrade organic matter.
OBJECTIVES
The aim of the present study was to evaluate the treatment of refinery rejects loaded with phenols and detergents by coagulation flocculation using cactus pads () as a bio-flocculant and 30% iron(III) chloride (FeCl) for surfactant and phenol removal. In addition, operating costs were evaluated for these pollution mitigation methods.
METHODS
The effectiveness of cactus pads as a bio-flocculant and 30% FeCl for surfactant and phenol removal were studied using a jar test. The study was conducted on vegetable oil refinery wastewater from a refinery company in Casablanca, Morocco.
RESULTS
The pollution load in wastewater varied widely from day to day. We evaluated the effect of cactus juice and 30% FeCl on high and low pollution loads. pads showed a favorable potential for the treatment of low pollution load wastewater, with 78% and 90% of surfactant and phenol removed, respectively. However, the removal of high pollution load was less effective (42% and 41% removal of surfactant and phenol, respectively). The turbidity of low and high pollution load was reduced by 98.85% and 86%, respectively. The results demonstrate that 30% FeCl can effectively treat both low and high pollution loads (90% and 89% phenol removal, respectively, and 90% and 70% surfactant removal, respectively (optimal concentration 1.48 g/l). The turbidity was reduced by over 96% for both high and low pollutants.
CONCLUSIONS
The results of the present study indicate that cactus as a natural flocculant and reject rich in FeCl could be effectively used for the low-cost effective treatment of crude vegetable oil refinery rejects.
COMPETING INTERESTS
The authors declare no competing financial interests.
背景
粗植物油精炼会产生大量废水，由于含有表面活性剂和酚类物质，它是水污染的一个来源。酚类是有毒的芳香族化合物，对动植物可能是致命的，会导致生物处理的自净减速或受阻。此外，表面活性剂可通过抑制降解有机物的微生物来限制生物过程。
目的
本研究的目的是评估使用仙人掌垫（）作为生物絮凝剂和30%氯化铁（FeCl）通过混凝絮凝处理含有酚类和洗涤剂的炼油厂废渣，以去除表面活性剂和酚类。此外，还评估了这些污染缓解方法的运营成本。
方法
使用搅拌试验研究了仙人掌垫作为生物絮凝剂和30%FeCl去除表面活性剂和酚类的有效性。该研究针对摩洛哥卡萨布兰卡一家炼油公司的植物油炼油厂废水进行。
结果
废水的污染负荷每天差异很大。我们评估了仙人掌汁和30%FeCl对高、低污染负荷的影响。仙人掌垫对低污染负荷废水的处理显示出良好潜力，表面活性剂和酚类的去除率分别为78%和90%。然而，对高污染负荷的去除效果较差（表面活性剂和酚类的去除率分别为42%和41%）。低、高污染负荷的浊度分别降低了98.85%和86%。结果表明，30%FeCl可有效处理高、低污染负荷（酚类去除率分别为90%和89%，表面活性剂去除率分别为90%和70%（最佳浓度1.48 g/l）。高、低污染物的浊度均降低了96%以上。
结论
本研究结果表明，仙人掌作为天然絮凝剂和富含FeCl的废渣可有效用于低成本高效处理粗植物油炼油厂废渣。
利益冲突
作者声明无竞争财务利益。
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